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1、外文资料翻译1.GPSobtainsthewide-spreadapplication,butitstillhadtheinsufficiency.GPShasbecomeaglobalhighandnewtechnologyindustry,whichisonekindofinformationinfrastructureandisenteringpeople'sdailylifegradually.Theexistenceinsufficiencyisveryobvious,itisthesystemwh
2、ichcontrolsbymilitary,anditisimpossibleatanytimeanyplaceguaranteecivil;Inthebustlingstreets,thejungle,orinthemaskandtheenvironmentbadsituation,itsusabilityisrestricted;Thesinglesystemitselfhasthelimitation,anditisimpossibletoguaranteeanyapplication.2.GLONAS
3、Sreceivestheattention,butitisactuallydisappointing.GLONASSoncegavepeopletheveryoptimisticscene,therealityisheartlessbecauseoftheeconomicalandthetechnicaldualreasons,whichenableitonlyworksincompletely,nowonlyhastheinsufficiencytenstarwork,andisveryunstable.3
4、.Galileoiforestallsopponentbyashowofstrength,withGPScombinationapplicationforoverallmentality.TheGalileoplanliftsuphighthepurecivilflag,feelsrelievedforthehumanwiththesecuritysense.MoreoveritsannouncepubliclyandtheGPScompatibleinteraction,strengtheneditsatt
5、ractionandthecompetitivepower,aswellasserviceguaranteepledge.Therichlycolorfulservicemaysatisfythedifferentscaleandtheapplicationdomaindemand.4.Themulti-systemcombinationisbetterandbetter,usingtheequipmentislimd.Manyyearslater,possiblyhasmanysatellitenaviga
6、tionalsystemintheskymovement,isthebetterandbetter,oneisnotunnecessary;second,cannotdotoousingthereceivercomplex,willotherwiseincreasethecostlargely,thebeingunablemasspromotion;third,willreceiveafterthesatellitenumberwillachievecertainnumber,thesatellitesign
7、al12many(willnotbringtheobviousadvantageagain.Generallyhasthepairofsystemfoot.5.Theenhancementsystememergesoneafteranotherincessantly,thefinaloutletisthemulti-system'scombination.Nowvarioussatellitenavigationenhancementsystememergesoneafteranotherincessantl
8、y,onlysaysbythemacrozonalityenhancementsystem,hasUS'sWAAS,Europe'sEGNOS,China'sCWAAS,Japan'sQZSS(alsohasonekindisMSAS).Oncehastwocompletewholeworldguidancesystem(GNSS)work,in-orbitsatellitereaches50-60
